Causes Of Leakage Of Construction Machinery Hydraulic Sealing System
May 24, 2022
1. Working pressure of hydraulic sealing system of construction machinery
Under the same conditions, the higher the pressure of the hydraulic system, the greater the possibility of leakage, so the size of the system pressure should be in line with the optimal value required by the hydraulic system, which can not only meet the working requirements, but also avoid the Necessary excessive system pressure.
2. Working temperature of hydraulic sealing system of construction machinery
Most of the loss of the hydraulic system is converted into energy, and part of this energy is emitted into the atmosphere through the surface of the hydraulic seal itself, the pipeline and the fuel tank, etc., and the rest is stored in the hydraulic oil, which increases the hydraulic temperature of the oil and the temperature of the hydraulic oil. The increase will not only reduce the viscosity of the hydraulic oil and increase the leakage of the hydraulic oil, but also cause the aging of the seals, premature seal failure, and cause serious leakage.
3. Cleanliness of hydraulic oil
The hydraulic oil of the hydraulic system often contains various impurities. For example, the hydraulic components are not cleaned when they are installed, and the impurities such as iron filings and coatings attached to them enter the hydraulic oil, and the dust and dirt that invade the hydraulic equipment contaminate the hydraulic oil, hydraulic The colloid, asphaltenes and carbon residues produced by the oxidative deterioration of oil. In the hydraulic oil, the wear of the sliding surface of the hydraulic components can be aggravated, the spool of the hydraulic valve is blocked, the small hole is blocked, the seal is damaged, etc., which will cause the hydraulic valve to be damaged and cause the hydraulic oil to leak.
4.The choice of seals
The correct selection of seals is very important to prevent leakage of hydraulic system seal failures. Reasonable selection of seals can improve the performance and efficiency of hydraulic equipment of construction machinery and prolong the service life of hydraulic seals. In order to prevent leakage caused by seal failure, otherwise, the seal is not suitable for working conditions, resulting in premature wear or aging of the seal, which will cause medium leakage.
In addition, the machining accuracy of hydraulic seals, the firmness of the pipeline connection of the hydraulic system of construction machinery and its shock resistance, and the status of equipment maintenance will also affect the leakage of hydraulic equipment.
